I've checked at the battery for a parasitic drain. Nothing...and that's with multiple meters, one a Fluke.
Disconnected the one connector on the OnStar control module in the trunk, the one which is black and second from the bottom. Have yet to be able to tell a difference.
I drive Pearl, daily, save for Friday, Saturday, and Sunday, when she typically stays parked, as we tend to use one of the other cars (it's easier for my partially-crippled wife and I to get in/out of the RX300 and the Jeep ZJ). Every day, she starts semi-normally. The starter doesn't spin as quickly as I expect, but all cars are different.
Some afternoons, there is a dip into the rrrrr-rrrrr sound, but she always fires. The garage is never all that cold, and there doesn't appear to be any difference in behavior due to season.
This is the second battery in two years, and I went to the largest one which fits. After replacing it last time, we went out-of-town in a different car for several days. Came back, the battery was 10 days old, an Interstate, IIRC, and sure enough, just enough juice to unlock the doors.
I put a charger on her every Thursday afternoon, and remove it every Sunday evening, but this should be wholly unnecessary. The Ultra Gauge shows ECU voltage while running is 13.5-14.0 after starting, and is down to 13.2-13.4 after my 30 mile, almost 100% freeway, drive home. The alternator puts out proper voltage. The terminals are clean, the battery is full, using only distilled water to replenish when needed, but what is going on?
I know about wet-cell batteries, having six of them in our motorcoach, and being able to get 10-12 years out of them before replacing. Typically a plate breaks free, and there's not much you can do about that. The STS's battery isn't sulfated, run low on electrolyte, abused...nothing.
Disconnected the one connector on the OnStar control module in the trunk, the one which is black and second from the bottom. Have yet to be able to tell a difference.
I drive Pearl, daily, save for Friday, Saturday, and Sunday, when she typically stays parked, as we tend to use one of the other cars (it's easier for my partially-crippled wife and I to get in/out of the RX300 and the Jeep ZJ). Every day, she starts semi-normally. The starter doesn't spin as quickly as I expect, but all cars are different.
Some afternoons, there is a dip into the rrrrr-rrrrr sound, but she always fires. The garage is never all that cold, and there doesn't appear to be any difference in behavior due to season.
This is the second battery in two years, and I went to the largest one which fits. After replacing it last time, we went out-of-town in a different car for several days. Came back, the battery was 10 days old, an Interstate, IIRC, and sure enough, just enough juice to unlock the doors.
I put a charger on her every Thursday afternoon, and remove it every Sunday evening, but this should be wholly unnecessary. The Ultra Gauge shows ECU voltage while running is 13.5-14.0 after starting, and is down to 13.2-13.4 after my 30 mile, almost 100% freeway, drive home. The alternator puts out proper voltage. The terminals are clean, the battery is full, using only distilled water to replenish when needed, but what is going on?
I know about wet-cell batteries, having six of them in our motorcoach, and being able to get 10-12 years out of them before replacing. Typically a plate breaks free, and there's not much you can do about that. The STS's battery isn't sulfated, run low on electrolyte, abused...nothing.